G S Rehill's Interactive Maths Software Series - "Building a Strong Foundation in Mathematics" from mathsteacher.com.au.

Order a 12-month Year 7 Interactive Maths software Homework Licence for only $19.95. Order a 12-month Year 8 Interactive Maths software Homework Licence for only $19.95. Order a 12-month Year 9 Interactive Maths software Homework Licence for only $19.95. Order a 12-month Year 10 Interactive Maths software Homework Licence for only $19.95.

Year 10 Interactive Maths - Second Edition


Problem Solving

Example 22

Find the cost of carpeting a room 10 m long and 8 m wide at $5.50 per square metre.

Solution:

So, the cost of carpeting the room is $440.

 

Example 23

A pebble path 1 m wide is to be laid around a square swimming pool, as shown. The quote to supply and lay the pebble mix is $15 per square metre.

Calculate:
a.  the area of the path
b.  the cost of the path

Solution:


Note:

The length and width of a rectangle should be expressed in the same units when calculating the area.


Example 24

A brick path 1 m wide is to be laid around a rectangular flower bed, as shown. The quote to supply and lay the bricks is $16 per square metre.

Calculate:
a.  the area of the path
b.  the cost of the path

Solution:


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